Rotary pump



Patented June 3%, 1

unirse statt-as SFUSTUS ROYAL KINNEY, 0F ALLSTGN, MASSACHUSETTS.

ROTARY rurais.

Application tiled February 17, 1922. Serial No. 537,174.

To all 'whom it 'may concern:

Be it known that l, JUSTUs R. KINNEY, a

-i citizen of the United States of America, and

a resident of Allston, inthe county of Suffolk and State olf-Massachusetts, have invented certain new and useful improvements in Rotary Pumps, of which the following is a specification. y

This invention 'relates to rotary pumps and has for its object the production of a pump in which provision is made to prevent the piston shaft from being forced out of alinement and in which provision is made to retain said shaft properly centered in the piston chamber under all conditions.

The invention consists primarily in mounting said piston shaft in anti-friction bearings surrounding hardened sleeves in which the opposite ends of the shaft are mounted.

The invention further consists in certain novel features of 'construction and arrangement .4 of parts which will be understood readily by yreference to the description of the drawings and to the claims to be hereinafter given.

For the purpose of illustrating the invention, one preferred form thereof. is shown in 'the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the va rious instrumentalities of which the invention consists can be `variously arranged and organized, and that the invention is not limited to the precise arrangement andv organization of the instrumentalities as herein shown and described, except as required by the scope of the appended claims.

Of the drawings:

Figure 1 represents a vertical longitudinal section of a pump embodying the principles of thel present invention.

Figure 2 represents a transverse section of same Jon line 2, 2 on Fig 1, and

Figure 3 represents a transverse section of same on line 3, 3 on Fig. 1.

Similar' characters indicate like parts throughout the several figures of the' drawings.

ln the drawings 10 is a casing having cylindrical chambers 11 therein, and two compartments 12 and 13, said casing having an inlet passage 14 communicating with the compartment 12 and an outlet' passage 15 communicating with the compartment 13.

.ln the wall 16 supporting the compartments 12 and"13, there is a passage 17 between the chamber ,11 and the compartment 13. @n the inlet side of the, dividing wall 16, a passage 18 extends from the compartment 12 to the chamber 11.

Centrally disposed in the chamber 11 is ashaft 19 to which are keyed two eccentrics 20 oppositely disposed., Surrounding each eccentric 2() is a piston member 21 having a radial blade 22, preferably formed integral therewith. this blade being adapted to reciprocate during the rotation of the eccentric 2O in a slot' 23 formed in an oscillating member 24 positioned in the passage 17.

This plate 22 has a passage 25 extending 7 from the outer end thereof to a point slightly removed Afrom the periphery of the piston member 21 and terminating on the outlet side of said blade.

The casing 10 is provided with end plates 26 and 27 secured to the opposite ends of the casing 10 by the bolts 28.

The chamber 11 has positioned therein two linings 29., the inner ends of which have dividing walls 30 abutting each other. rlhese walls 3() have mounted in the upper ends thereof bearing rings 31, and in axial alinement with these bearing rings 31 are other bearing rings-32 mounted in depressions in the inner faces of the end plates 26 and 27.

ln these bearing rings 31 and 32, the oscillating members 24 'are adapted to move about their axes as the eccentrics 20 rotate about the axis of the shaft 19 and tilt the blade 22.

The inner ends of the oscillating members 24 abut each other as indicated in Fig. 1 of the drawings. a

Each lining 29 is provided with an an# nular flange 33 on its outer end, which extends into a depression on the -inner faces of the end plates 26 and 27. rlhe end plate 26 is provided with a hub 34 and the end plate 27 is provided with 'a hub 35, said hubs being in alinement.

The outer end of the hub 34 is closed by the plate 36. Each hub 3ft and 35 has an inwardly extending flange 37 adjacent the inner faces of the plates 26 and 27, and against each ange 37 is positioned a' packing gland 38 formed in two parts with packing rings 39 inserted between said parts;

rl`he shaft 19 is provided with an enlarged cylindrical portion 40, Awhich is adapted to rotate in bearings in theend walls 30 of the linings 29. The outer ends of the shaft 19 roo i duced in diameter as shown at 41, thereby forming shoulders 42, against whichfare positioned the hardened sleeves 43, surrounding the inner ends of the portion 41 of the shaft 19. s

Within the hubs 34 and 35 and surrounding the sleeves 43 are the hardened rings 44 between which and the sleeves 43 are a plurality of anti-friction members 45. In the hubs 34 and 35 are disposed the radial threaded members 46, the inner ends of which are in contact with the peripheries ot' the hardened rings 44, said members 46 being adapted to be adjusted to bring the hardened rings 44 into axial alinement with the center of the chambers 11.

T he outer end of the reduced portion 41 of the shaft 19 within the hub 34 is surrounded by a sleeve 47, and'between the plate 36 and the hardened ring 44 is interposed an annular filling member 48, this filling member serving to retain the anti friction members 45 in position.

'ithin the hub 35 and bearing against the outer end of the ring 44 is an annular member 49, while in the outer end of said hub 35 is a stuiing-box gland 50. Between the inner end of the stuiiingbox gland and the ring 49 are two metallic packing rings 51 and 52.

By providing the casing with the linings 29, the said casing may be used indefinitely, for when either lining 29 has become injured or worn, it may be removed and a new one substituted therefor within the same casing.

By providing the outer ends 4l of the shaft 19. with the hardened slee-ves surrounded by anti-friction members, the bearings for the shaft are less liable to become Worn and out of center with the chamber 11.

As the pistons 21 rotate within said chambers 11, the tendency is for the pressure of the liquid being pumped to force the piston against the opposite wall of said chamber, and the sha-ft 19 against the opposite wall of its bearings. Should either of these surfaces become worn, the shaft 19 would be liable to get out of alinement with the center of the chambers 11 and imperfect results would obtain.

By providing a means whereby the shaft may be mounted in anti-friction bearings, with packing glands between said bearings Lacasse and the chambers 1l, this objectionable feature is wholly overcome, and the shaft 19 will always be maintained in perfect alinement with the center of said chambers 11. This is of great importance in the proper 0peration of devices of this character.

It is believed that the operation and many advantages of the invention will be readily understood without further description.

Having thus described my invention, l claim:

1. In a rotary pump, a casing having' a cylindrical piston chamber with inlet and outlet passages communicating therewith; a revoluble shaft centrally disposed in said chamber and having an enlarged cylindrical portion midway between the ends of said chamber; cup-shaped lining members disposed within said piston chamber and having abutting inner walls provided with bearings for the enlarged portion of said shaft; and an eccentric piston revoluble with said shaft on each side of the abutting walls of said linings, with their inner ends abutting the opposite faces of said enlarged cylindrical portion of the shaft.

2. In a rotary pump, a casing having a" cylindrical piston chamber with inlet and outlet passages communicating therewith; a revoluble shaft centrally disposed in said chamber: and two removable cylindrical lining members disposed within said chamber, said lining members having their outer ends open and their inner end walls abutting.

3. In a rotary pump, a casing having a cylindrical piston chamber with inlet and outlet passages communicating therewith; a revoluble shaft centrally disposed in said chamber; and two removable cylindrical lining members disposed within said chamber, said lining members having their outer ends disposed within said chamber, said lining members having their outer ends open and their inner end walls abutting, the outer ends of said lining members having annular flanges disposed in grooves in the end walls of said pump.

Signed by me at Boston, Mass., this 15th day of February, 1922.

JUsTUs ROYAL KINNEY. 

